Comparison

My Lisp vs ReasonML

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

My Lisp

A comprehensive Lisp programming environment for iOS and macOS devices. It offers a local interpreter, editor, and extensive libraries for learning and developing Lisp programs, including advanced mathematical functions and symbolic derivation.

Highlights
  • Local Lisp interpreter
  • Integrated editor
  • Core and mathematical operators
  • Advanced mathematics functions
  • Symbolic derivation module
  • Library and example files
  • User and reference manuals
Features
Read full description

My Lisp is a complete and universal Lisp environment running directly on the iPhone, iPad, and Mac. This interpreter is true to the original John McCarthy Lisp implementation with the fundamental 7 operators quote, atom, eq, car, cdr, cons, cond, along with lambda and label. My Lisp also contains core and mathematical operators borrowed from other Lisp dialects (Le Lisp, Lisp 1.5, MacLisp, Common Lisp and Scheme to name a few) to make it easy to learn, program, and most importantly, enjoy Lisp. It also features built-in functions for advanced mathematics, including complex numbers and numerical analysis (roots and zeros finder, integral approximation). The complete description of the fundamental, core, and built-in functions is available using a set of library functions completely written in My Lisp. My Lisp offers an interpreter and an editor, all working on the iPhone, iPad, and Mac, and most importantly, without requiring any server connection, that is, the interpreter is executing locally on the iPhone, iPad or Mac My Lisp is installed on. Library and example files contain the source code of classical functions and problems solved by My Lisp and may be used as reference to learn Lisp and develop other programs. They include classical puzzles (hanoi and n-queens), basic mathematical functions (gcd, lcm, factorial, fibonacci, prime?), and the historical apply, mapcar and maplist functions. The Lambda Calculus example file contains various functions related to Lambda Calculus and Combinators, with alpha-conversion, beta-reduction, de Bruijn notations, etc. As a special note, the example file Symbolic Derivation contains a complete yet extensible symbolic derivation module allowing to compute the formal derivation of virtually any symbolic function expressed as a Lisp expression. A user manual and a reference manual are available from within the application but also on My Lisp web site (https://lisp.lsrodier.net) and in Apple Books. The complete source code of the library and example files is part of My Lisp. Last but not least, this overview couldn’t end without a sample definition of the notorious REPL function: (define (REPL eval_me) (REPL (println (eval (read)))))

About

ReasonML

This app serves as a playground for ReasonML, allowing users to convert code between ReasonML and OCaml. It also compiles code to JavaScript and displays the JS console output directly within the application.

Highlights
  • ReasonML to OCaml conversion
  • OCaml to ReasonML conversion
  • Compile to JavaScript
  • View JS console output
Features
Read full description

Playground for ReasonML * Convert between ReasonML and OCaml * Compile to JS * View JS console output

Screenshots

My Lisp4 screens
ReasonML4 screens

Verdict

The call

The clearest difference is price: ReasonML at Free against My Lisp's $3.99. ReasonML also leads on rating (5.0 vs 4.1) and review sentiment (100% vs 69%). My Lisp's advantage is chart position (#85 vs unranked) and ratings volume (17 vs 3). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

ReasonML is free to download; My Lisp costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ReasonML holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: My Lisp has 17 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 69% of My Lisp's written reviews are positive against 100% of ReasonML's.

UpkeepUpdate frequency

My Lisp ships an update every 6 weeks, ReasonML every 2 days. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

Scorecard8 real differences · 3 level
My Lisp versus ReasonML: the parameters behind the verdict, then further details
ParameterMy LispReasonML
Price$3.99Free — better
Rating4.1 (17 ratings)5.0 (3 ratings) — better
Positive reviews68.8% of reviews100.0% of reviews — better
Number of ratings17 — better3
Update frequencyEvery 6 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#85 — better—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS18.013.4 — better
Further details — not scored
Size19 MB8 MB
Age rating4+4+
DeveloperLaurent RodierJacob Parker

Customer experience

My Lisp

All ratings17 ratings
Positive82.4%
Neutral0.0%
Negative17.6%
Written reviews16 reviews
Positive68.8%
Neutral12.5%
Negative18.8%

ReasonML

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

My Lisp

No in-app purchases

None

ReasonML

No in-app purchases

Questions

Is My Lisp free?
My Lisp costs $3.99, with no in-app purchases.
Is ReasonML free?
ReasonML is free to download, with no in-app purchases.
Which has better reviews, My Lisp or ReasonML?
ReasonML is rated higher. My Lisp averages 4.1 out of 5 from 17 ratings, while ReasonML averages 5.0 from 3 ratings.
Do My Lisp or ReasonML have ads?
Neither My Lisp nor ReasonML shows ads.
Which is updated more often, My Lisp or ReasonML?
My Lisp ships an update every 6 weeks, and ReasonML every 2 days. Most recently, My Lisp was updated on October 24, 2026 and ReasonML on October 15, 2026.

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